-detboit



P. T. HAMM,

} TIRE CHAIN; APPLICATION FiLED JAN.20,1919.

1,325,321, 1 mm Dec. 1mm.

fiM L/P THIMM.

PHILLIP 'r. HAir osnnrnolm, M cinc'a i, assienpn or one-smith To man 0.

Specification of Letters remit.

Patented Dec. 16, 1919.

. I Apiilieation filed hungry-20, 1919.";Seria'1 Nd. 271,982;

1 '0 all whom it may condom Be it known that L PnniLir-T. Hungacitizen of the United States, residing at Detroit, county of lVayne, State-0t. Michi 'am.

have invented a certain new and useful linprovement in Tire-Chains, and declare the followingtobe a full, elean nid exact de-- scription of the same, such as will enable others skilled in the art to which it pertains to makeand use the same, reference being had to the accompanyin r drawings, which form a part of this spec-i cation. 7

My invention relates to anti-skid devices for tires commonly known as tire chains and used on the tires of motor vehicles to prevent slipping and skidding. o

The objectof my-invention is to furnish an improved cross member for the tread, which consists of links that can be n1ade from sheet metal blanks and sections of heavy wire or analogous material, shaped and connected as hereinafter described.

Both the blanks and the wiresections are very simple and yet form a strong chain, at the same time affording a strong grip upon the road having a roinparath'ely smooth and HON-Wtill'lflg surface upon the tire.

1n the drawings:

Figure 1 showsthe appearance. of the chain when assembled, a. part thereof being hroken away.

Fig. 2 shows a block or link composed of sheet metal and the ends of the wire clasped therein. i

Fig. 3 is a section on the line XX of Fig. 2.

Fig. l is across section on the line YY of Fig. 3.

Fig. 5 a perspective NlC-W of .one of the sheet n'xetal. plates formed in shape.

Figs; (3. T and 8 are figures of an alternate construction upon thesame view in which links are employed of H--sliape in the place of the bent wire links. Fi 6 shows the manner of assembly. Fig. l shows one of the blocks which is made of sheet metal and punched ready to leceive the wire links, and Fig. 8 shows one of the links in perspective.

Similar letters refer to similar parts.

Fig. 5 shows in perspective one of the completed links. This link. is fashioned by punching out from therenterof a sheet metal blank two lips B, C in the form shown wire-links F and G.

in Fig, 3; downwardly bent tongues B and C of-said' sheet metal links are clasped by These wire links which are caried in pairs hooked together as shown in Figi 1 are looped over. suclr down wardly projecting ..tongu es connecting adjacent sheet metallinks oneto the other. Edges D and E of the sheet metal links are then turned downwardly and inwardly until. they meet as shown in Fig. 5. This action completely closes such sheet metal links embracing the wire links F and G so'they cannot spread no matter what pull. may be placed upon them. The wire links are each given, respectii 'ely, a certain amount of twist in the curved portion at ll so that the assembled structures with the sheet metal part- A, when united as shown at H, will lie flat or in the same plane. A suflicient number of these links are connected together in their formation so as to provide chain as shown in Fig. 1. If used as cross chains in automobile practice two end pieces of wire .l nd K are providedwhich may be linked -to the side chains of the usual form and their ends L and M hent downward the side chains in the usual manner. These form. no part of my invention which consists in the formation and assemblage oi? chains of the foregoing description, 'Wher.

used as cross chains by arranging each oi. these so that the joined edges l) andll or the block or sheet metal part A is inward toward the surface ot'the tire, the tire contacts with the smooth surface only, the rough surface made by the punching at C being outward and tending to engage the surface of the" road and thus assist in preventing slipping. In the alternative construction shown in Figs. 6, 7 and an shaped link N is shown in Fig. 8 engaging a sheet metal part, l,in which there are two pnnchings with dependent lips, as shown at Q and ll. in the perspective figure; the opposite depending lips are not shown. .An. integral link N is inserted between the parallel punched-out lips Q and it of sheet metal link P so that the oppositely directed.

ends of a erossdwad' oi said link. I im- Edges D and E of said sheet metal link are then folded over in manner heretofore described to form a chain.

What I desire to claim is: 4

1. In an anti-skid chain, a tubular link which is rectangular in cross-section formed fromfan integral blank provided with internally dependent longitudinally opposed tongue portions punched therefrom, connecting links infolded by and carried at opposite ends of saidtubula r link by being looped over said tongue portions, thesaid connecting links carried by one tubular-link engaging connecting links carried by ad'acent tubular links so as to join the tubui links and form a chain. v

2. In an anti-skid chain, a tubular link rectangular in cross-section formed from an integral blank, opposed longitudinally extending dependent tongue portions punched therein, a wire link carried by each of said tongue portions, wire links carried b adjacent tubular linksarticulating tobrm a chain.

3. In an anti-skid chain, a link formed from an integral blank comprising two internally dependent longitudinally opposed offset extensions, said blank being bent upon itself to form a tubular link, a Wire link looped around saidoffset extension, wire links of adjacent tubular links connected together to form a chain.

In testimony whereof, I sign this specification.-

PHILLIP T. HAMM. 

